to provide information on a source used to create a document
to identify the sources on each page of a document in the form of links
to provide additional information that does not fit in the main body of the text
to mark a location in a document to make it easier to navigate to that location
They acknowledge the source of a quotation, paraphrase, or summary; and (2) They provide explanatory comments that would interrupt the flow of the main text.so its B
